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Schneider, R.* ; Bannister, A.J.* ; Weise, C.* ; Kouzarides, T.*

Direct binding of INHAT to H3 tails disrupted by modifications.

J. Biol. Chem. 279, 23859-23862 (2004)
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Open Access Green as soon as Postprint is submitted to ZB.
The N-terminal tails of histones are central to the regulation of chromatin structure. They form a binding platform for multiple protein complexes, which in turn regulate DNA processes such as transcription. Using peptide mass fingerprinting we identified INHAT (inhibitor of acetyltransferases) as a specific histone H3 N-terminal tail-binding complex. INHAT comprises two essential subunits, SET and pp32. We demonstrate that both SET and pp32 bind directly to the N terminus of H3. The binding is differentially affected by various modifications within the H3 N terminus. In particular, single phosphorylations within the H3 tail abrogates binding of INHAT, as does the simultaneous acetylation of multiple lysine residues. The histone modifications that affect INHAT binding are therefore compatible with its known role in transcriptional repression. We suggest that the charge of the histone tail is a major determinant in allowing INHAT to bind chromatin and coordinate the activity of multiple histone acetyltransferases.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 0021-9258
e-ISSN 1083-351X
Quellenangaben Volume: 279, Issue: 23, Pages: 23859-23862 Article Number: , Supplement: ,
Publisher American Society for Biochemistry and Molecular Biology
Reviewing status Peer reviewed